Earthing switch and air insulated switchgear

Abstract

The utility model provides an earthing switch and an air-insulated switch cabinet, the earthing switch comprising: a frame; a main shaft (2) rotatably connected to the frame; a unilateral energy storage structure (3) fixed to one side of the frame, the unilateral energy storage structure (3) being used to drive the main shaft (2) to rotate; at least one contact structure, each of the contact structures comprising: a support insulator (41) fixed to the frame; a stationary contact (42) fixed to one end of the support insulator (41) away from the frame; a moving contact (43) fixed to the main shaft (2) and capable of rotating with the main shaft (2) to contact or separate from the stationary contact (42); the frame is an integrated frame (1), the integrated frame (1) being used to be installed on a column (6) of a switch cabinet.

Description

Technical Field

[0001] The utility model relates to the field of switch cabinets, in particular to a grounding switch and an air-insulated switch cabinet. Background Art

[0002] Switchgear is an important equipment in the power system. The switchgear body is usually divided into a trolley room, a busbar room, a cable room and a low-voltage room. A trolley circuit breaker is usually installed in the trolley room, and a grounding switch is usually installed in the cable room. It is a mechanical grounding device to ensure personal safety during maintenance.

[0003] The grounding switch is usually installed on a load-bearing column in the switch cabinet. In the prior art, two upper and lower mounting beams are usually set on the column, and then the frame of the grounding switch is installed on the two mounting beams, so that the grounding switch is fixed on the mounting beams as a whole. This installation method makes the installation process more complicated, and the additionally installed mounting beams may also hinder other equipment that needs to be installed on the column. Utility Model Content

[0004] In view of this, the utility model proposes a grounding switch, comprising:

[0005] frame;

[0006] a main shaft rotatably connected to the frame;

[0007] A unilateral energy storage structure, which is fixed to one side of the frame, and the unilateral energy storage structure is used to drive the main shaft to rotate;

[0008] At least one contact structure, each of the contact structures comprising:

[0009] a post insulator fixed to the frame;

[0010] A stationary contact fixed to an end of the post insulator away from the frame;

[0011] A moving contact, which is fixed to the main shaft and can rotate with the main shaft to contact or separate with the stationary contact;

[0012] The frame is an integrated frame, and the integrated frame is used to be installed on a column of a switch cabinet.

[0013] According to the grounding switch of the utility model, an integrated frame is provided, so that the integrated frame can be fixed on the column of the switch cabinet without the need for additional mounting beams, and the process is simple and easy to install.

[0014] According to the grounding switch as described above, optionally, the integrated frame includes:

[0015] U-shaped frame;

[0016] Two side baffles are fixed integrally to two sides of the U-shaped frame and arranged opposite to each other, and the main shaft is rotatably connected between the two side baffles.

[0017] The use of a U-shaped frame allows the portion where the frame is installed to be concentrated as close to the top as possible, thus leaving enough space below to avoid affecting equipment in adjacent rooms.

[0018] According to the grounding switch as described above, optionally, the U-shaped frame includes:

[0019] U-shaped plate;

[0020] A bending plate, which is integrally connected to the U-shaped plate, the cross section of the bending plate is U-shaped, the post insulator is fixed to the bending plate, and the bending plate protrudes toward the direction of the main axis;

[0021] The two side plates are fixed integrally to both sides of the U-shaped plate.

[0022] In this way, when the post insulator is mounted on the integrated frame, sufficient space is reserved for the screws to avoid affecting the equipment in the adjacent room.

[0023] According to the grounding switch as described above, optionally, the stationary contact comprises:

[0024] A first plate, which is fixed to one end of the support insulator through a support block, the first plate extends along a first direction, the support insulator extends along a second direction, and the first direction is perpendicular to the second direction;

[0025] The second plate is vertically fixed to a side of the first plate facing the integrated frame.

[0026] Such a stationary contact has a simple structure and low cost.

[0027] According to the grounding switch as described above, optionally, the moving contact comprises two blades, the two blades are arranged in parallel, and the second plate can be inserted between the two blades to achieve closing.

[0028] According to the grounding switch as described above, optionally, there are three contact structures, and the grounding switch further comprises: a short-circuit structure that runs through the three moving contacts, so that the three phases are short-circuited together, further ensuring the grounding performance of the grounding switch.

[0029] According to the grounding switch as described above, optionally, the short-circuit structure is a tubular conductor.

[0030] According to the grounding switch as described above, optionally, the moving contact is fixed to the main shaft by welding.

[0031] The utility model also provides an air-insulated switch cabinet, comprising:

[0032] Cabinet;

[0033] The grounding switch described in any one of the above items is located on a side of the cable chamber of the cabinet close to the circuit breaker chamber.

[0034] According to the air-insulated switchgear as described above, optionally, it further comprises at least one of the following devices:

[0035] a current transformer located in the cable chamber and on the same side as the integrated frame;

[0036] Get off the PT car. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that those skilled in the art will be more aware of the above and other features and advantages of the present invention. In the accompanying drawings:

[0038] Figure 1 Schematic diagram of the structure of a grounding switch according to an embodiment of the utility model.

[0039] Figure 2 The figure is a schematic diagram of the structure of the grounding switch according to the utility model installed on the column of the switch cabinet.

[0040] Figure 3 The figure is a schematic structural diagram of an integrated frame of a grounding switch according to an embodiment of the present utility model.

[0041] Figure 4 The figure is a schematic structural diagram of a moving contact of a grounding switch according to an embodiment of the utility model.

[0042] Figure 5 The figure is a schematic structural diagram of a static contact of a grounding switch according to an embodiment of the utility model.

[0043] The reference numerals are as follows:

[0044] 1-One-piece frame

[0045] 11-U-shaped frame

[0046] 111-U-shaped plate

[0047] 1111-first through hole

[0048] 112-Bent Plate

[0049] 1121-Second through hole

[0050] 12-Side baffle

[0051] 2-Spindle

[0052] 3-Unilateral energy storage structure

[0053] 41-Post Insulator

[0054] 42-static contact

[0055] 421-First Board

[0056] 422-Second Board

[0057] 43-Moving contact

[0058] 431-Blade

[0059] 432-Body

[0060] 433-Axis pin

[0061] 434-Pressure Regulator

[0062] 44-Support block

[0063] 45-Short-circuit structure

[0064] 5-Crank Arm

[0065] 6- Column

[0066] 7-Copper busbar DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail with reference to the following embodiments. The nouns and pronouns related to people in this patent application are not limited to specific genders.

[0068] The utility model provides a grounding switch.

[0069] like Figures 1 to 5 As shown, the grounding switch comprises a frame, a main shaft 2, a single-side energy storage structure 3 and at least one contact structure. Each contact structure comprises a post insulator 41, a static contact 42 and a moving contact 43. Figure 1 , there are three contact structures, each contact structure corresponds to one phase, and there are three phases in total.

[0070] The main shaft 2 is rotatably connected to the frame, and the main shaft 2 can be driven to rotate manually or electrically, for example, by a crank arm 5, and the crank arm 5 is fixed to the main shaft 2. The main shaft 2 is made of steel material, for example.

[0071] The unilateral energy storage structure 3 is fixed to one side of the frame, and the unilateral energy storage structure 3 is used to drive the main shaft 2 to rotate. The unilateral energy storage structure 3 indicates that the grounding switch has only one energy storage structure, which can release energy after storing energy to accelerate the rotation of the main shaft 2. The specific implementation method of the energy storage structure belongs to the prior art and will not be repeated here.

[0072] The support insulator 41 is fixed to the frame, the static contact 42 is fixed to one end of the support insulator 41 away from the frame, and the moving contact 43 is fixed to the main shaft 2 and can rotate with the main shaft 2 to contact or separate from the static contact 42. The moving contact 43 can rotate between an opening position and a closing position. When the moving contact 43 is in the opening position, the moving contact 43 is separated from the static contact 42. When the moving contact 43 is in the closing position, the moving contact 43 is in contact with the static contact 42. Figure 1 The moving contact 43 is shown in the open position. The stationary contact 42 is connected to a copper bar, which is used to connect other components, such as PT (Potential Transformer). The post insulator 41 can be an insulator used to rigidly support the live parts and insulate them from the ground or another live part.

[0073] In the present invention, the frame of the grounding switch is an integrated frame 1, which is used to be installed on the column 6 of the switch cabinet. The width of the integrated frame 1 matches the column 6 of the switch cabinet, and can be directly installed on the side of the column 6 facing the need to install the grounding switch. Figure 2 As shown, the column 6 is L-shaped, and the integrated frame 1 is installed on the side facing the cable chamber, so that it will not affect the space on the other side of the column 6. During installation, it is only necessary to install the integrated frame 1 as a whole to the column 6 without adding other components.

[0074] According to the grounding switch of the present invention, by providing an integrated frame 1, the integrated frame 1 can be fixed on the column 6 of the switch cabinet without the need for an additional mounting beam, which has a simple process and is easy to install.

[0075] As an exemplary illustration, the integrated frame 1 includes a U-shaped frame body 11 and two side baffles 12. The two side baffles 12 are fixed integrally to both sides of the U-shaped frame body 11 and are arranged opposite to each other. The main shaft 2 is rotatably connected between the two side baffles 12. Figures 1 to 3 As shown, the two side baffles 12 are integrally formed with the U-shaped frame 11, for example, they are formed by stamping and bending the same plate. The two side baffles 12 can form a supporting structure to support the main shaft 2. In addition, the use of the U-shaped frame 11 can make the part where the frame is installed as concentrated as possible. Figure 2 This leaves enough space below to avoid affecting the equipment in adjacent rooms.

[0076] As an example, the U-shaped frame 11 includes a U-shaped plate 111 and a bent plate 112, wherein the bent plate 112 is integrally connected to the U-shaped plate, the cross section of the bent plate 112 is U-shaped, the support insulator 41 is fixed on the bent plate 112, and the bent plate 112 protrudes toward the direction of the main shaft 2. That is, the U-shaped plate and the bent plate 112 are also integrally formed, for example, they are stamped and bent from the same plate. The bent plate 112 protrudes toward the direction of the main shaft 2, thereby forming a certain space, so that when the support insulator 41 is installed on the integrated frame 1, sufficient space is reserved for the screws to avoid affecting the equipment in the adjacent chamber, such as Figure 3 As shown, a second through hole 1121 for fixing the support insulator 4 is reserved on the bent plate 112. In addition, the existence of the bent plate 112 can strengthen the strength of the entire integrated frame 1. In addition, the two side plates are respectively located on both sides of the U-shaped plate 111, which can support the main shaft 2 and use as little raw materials as possible to reduce costs. A plurality of first through holes 1111 are reserved on the U-shaped plate 111, and the U-shaped plate 111 can be fixed to the column 6 through the first through holes 1111 and a fixing member (not shown in the figure).

[0077] Alternatively, if Figure 5 As shown, the static contact 42 includes a first plate 421 and a second plate 422, and the two plates are perpendicular to each other. The first plate 421 is fixed to one end of the supporting insulator through a supporting block 44, the first plate 421 extends along a first direction, the supporting insulator extends along a second direction, the first direction is perpendicular to the second direction, and the second plate 422 is vertically fixed to a side of the first plate 421 facing the integrated frame 1. Such a static contact 42 has a simple structure and low cost.

[0078] Correspondingly, the moving contact 43 includes two blades 431, and the two blades 431 are arranged in parallel. The second plate 422 can be inserted between the two blades 431 to achieve closing. Each blade 431 has a gap 4311 in the length direction, which makes it more elastic. For the moving contact 43, it also includes a seat body 432, an axle pin 433 and two pressure adjustment members 434. The seat body 432 is fixedly connected to the main shaft 2, for example, welded to the main shaft 2. The two blades 431 are respectively fixed to the two sides of the seat body 432, for example, through an elastic cylindrical pin (not shown in the figure) passing through the two blades 431 and the seat body 432, so that the three are fixed together. The shaft pin 433 is inserted through the two blades 431, specifically through the gap 4311 between the two blades 431. The shaft pin 433 is also provided with a spacer (not shown in the figure), which is used to separate the two blades 431, and can ensure that a certain interval is maintained between the two blades 431, so that the static contact 42 can be smoothly inserted between the two blades 431. Two pressure adjustment members 434 are sleeved on the shaft pin 433 and located on the opposite sides of the two blades 431. The two pressure adjustment members 434 can apply thrust to the two blades 431. When the second plate 422 of the static contact 42 extends between the two blades 431, the two blades 431 can clamp the static contact 42. When the static contact 42 leaves the moving contact 43, the two pressure adjustment members 434 can reset the blades 431. The pressure adjustment member 434 is, for example, a disc spring. A gasket is also provided on the outer side of the pressure regulating member 434 , and the gasket can make the installation of the pressure regulating member 434 easier.

[0079] Optionally, there may be three moving contacts 43, and one short-circuit structure 45 may penetrate the three moving contacts 43, so that the three phases are short-circuited together, further ensuring the grounding performance of the grounding switch. The short-circuit structure 45 may be a tubular conductor, such as a copper tube or an aluminum alloy tube, which has good electrical conductivity.

[0080] The utility model also provides an air-insulated switch cabinet, which includes a cabinet body and any one of the above grounding switches, wherein the grounding switch is located in a cable chamber of the cabinet body and is located on a side of the cable chamber close to a circuit breaker chamber. An integrated frame 1 is used so that the grounding switch and the equipment on one side of the circuit breaker chamber can avoid mutual influence as much as possible, so as to reserve sufficient space for installation or maintenance.

[0081] The air-insulated switch cabinet also includes a current transformer (not shown in the figure) and a lower PT trolley (not shown in the figure). The current transformer is located in the cable room and on the same side as the integrated frame 1, so that the current transformer is also close to the circuit breaker room. The connection line used when the circuit breaker in the circuit breaker room is connected to the current transformer is shorter, which can save materials. The lower PT trolley means that the PT is carried on the trolley and the position of the PT is located below the position where the circuit breaker should be. The structure of the lower PT trolley can adopt any one of the existing technologies, which will not be repeated here.

[0082] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Earthing switch, including: frame; a main shaft (2) rotatably connected to the frame; A unilateral energy storage structure (3) is fixed to one side of the frame, and the unilateral energy storage structure (3) is used to drive the main shaft (2) to rotate; At least one contact structure, each of the contact structures comprising: A post insulator (41) fixed to the frame; A stationary contact (42) fixed to an end of the support insulator (41) away from the frame; A moving contact (43) fixed to the main shaft (2) and capable of rotating along with the main shaft (2) to contact or separate from the stationary contact (42); The invention is characterized in that the frame is an integrated frame (1), and the integrated frame (1) is used to be installed on a column (6) of a switch cabinet.

2. The grounding switch according to claim 1, characterized in that: The integrated frame (1) comprises: U-shaped frame (11); Two side baffles (12) are fixed integrally to two sides of the U-shaped frame (11) and are arranged opposite to each other, and the main shaft (2) is rotatably connected between the two side baffles (12).

3. The grounding switch according to claim 2, characterized in that: The U-shaped frame (11) comprises: U-shaped plate (111); a bent plate (112) integrally connected to the U-shaped plate, the cross section of the bent plate (112) being U-shaped, the post insulator (41) being fixed on the bent plate (112), and the bent plate (112) protruding in the direction of the main axis (2); The two side baffles (12) are fixed in one piece on both sides of the U-shaped plate (111).

4. The grounding switch according to claim 2, characterized in that: The stationary contact (42) comprises: A first plate (421) fixed to one end of the post insulator (41) via a support block (44), the first plate (421) extending along a first direction, the post insulator (41) extending along a second direction, the first direction being perpendicular to the second direction; The second plate (422) is vertically fixed to a side of the first plate (421) facing the integrated frame (1).

5. The grounding switch according to claim 4, characterized in that: The moving contact (43) comprises two blades (431), the two blades (431) are arranged in parallel, and the second plate (422) can be inserted between the two blades (431) to achieve closing.

6. The grounding switch according to claim 1, characterized in that: The contact structure has three parts, and the grounding switch further includes: A short-circuit structure (45) runs through the three moving contacts (43).

7. The grounding switch according to claim 6, characterized in that: The short-circuit structure (45) is a tubular conductor.

8. The grounding switch according to any one of claims 1 to 7, characterized in that: The moving contact (43) is fixed to the main shaft (2) by welding.

9. Air insulated switchgear, characterized in that: include: Cabinet; The grounding switch according to any one of claims 1 to 8 is located on a side of the cable compartment of the cabinet close to the circuit breaker compartment.

10. The air-insulated switchgear according to claim 9, characterized in that: Also includes at least one of the following equipment: A current transformer, which is located in the cable chamber and on the same side as the integrated frame (1); Get off the PT car.

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